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ZYGNEMATACEAE
PLATE XXX
Spikogyka
Figs. 1-2.—5. brunnca, gametangia, zygospores, and s[)orc wall pattern,
from Transvaal. After Fritsch and Rich. Figs. 3-4. S. scripta, gametangia,
and zygospores from Transvaal. After Nygaard. Fig. 5. S. fluviutdis,
receptive gametangium and zygospore from Illinois. Fig. 6. S. grossii,
zygospore from Yugoslavia. After Schmidle. Fig. 7. S. novae-angliae,
gametangia and zygospore from New York. After Blum. Figs. 8-10. S.
verruculosa, vegetative cell, zygospore, and spore wall pattern from Hang-
chow, China. After Jao. Figs. 11-13. S. punctulata, vegetative cell, gam-
etangia, zygospore, and cell wall details, from China. After Jao. Fics. 14-
16. S. malmeana, gametangia, zygospores, and spore wall pattern from
Brazil. After Borge. Figs. 17-18. S. echinospora, chromatophores, gam-
etangia, zygospore, and median spore wall pattern from New Hampshire.
After Blum. Figs. 19-20. S. d'lluta, conjugating filaments, and character-
istic orientation of spores, also spore wall details. In part after Wood.